Forum Replies Created
-
AuthorPosts
-
Replace capacitors on the decoder/audio PCB.
Martin
Chatol of course.
Martin
In the Master 41 service manual, where the versions B, K , S and RG are covered,
the B is mentioned as the model housed in bakelite.
Of course there must be another explanation for the 510B etc.S is mentioned as a “konsolskab” (Skab = cupboard or closet), so a console model.
“Klangbund” is not really a part of the model name.
The Klangbund (“Soundboard”) is a type of passive radiator for low frequencies, working on what B&O described as an “elastic pillow” of air between the speaker cone and the radiator.
In fact it is the back plate of the receiver, and it’s a (relatively) airtight cover, that will “play along” with the bass (read: deepest notes) using a wall behind the receiver as reflector.Try listening to it if you get a chance, it actually works.
Martin
B: I think this was only used for bakelite models that were also available in a wooden cabinet. At present I can only think of Master 41K/41B
U: Universal (suitable for both DC and AC mains)
CH: Chartol
K: I think is for Kabinet (cabinet housed) – usually with built-in speaker. I believe this is a leftover from when many radios were also available as chassis’ only
S: Used mainly for console models. S could be for Stående (Standing) or solitair
RG: Radiogramophone (radio/gramophone combination)
RGS: Standing Radiogramophone
BRG: Bord-Radiogramophone (tabletop-radiogram)
P: I think is for Papir-isolation (paper-insulated leads – due to WW2 material shortages)
Martin
1974/75 is correct.
Martin
Check the muting switch.
Martin
Drill through the breaks and glue in steel pins.
Martin
No.
The small thermo relay has a yellow reset button sticking out the front near the “Overload” printing.Martin
If the whole speaker goes silent, failing contact in the safety (thermo-) relay.
Give it a blast of contact cleaner and excersize it a couple dozen times.Martin
I can’t find any mentioning of this resistor in my notes, but if it sits in series with the
supply to the regulator it is far more likely to be a 4,7ohm or similar value.
And it should be a flame-proof type.Martin
A 1M resistor would not be a “voltage limiter”, and it won’t be in series with the supply in any way as even the smallest current would result in a huge voltage drop across it.
Could be a bleeder or a coupling to another part of the supply – but don’t worry about this resistor at this point.Set your meter to DC volts.
Clip your meters negative lead to the negative pin on C3.With the positive lead please take readings on
– C3 positive lead
– IC1 all three pins respectively
– TR5 all three pins respectivelyMartin
Is the problem from all sound sources (FM/Tape/CD)?
Have you checked or reset the sound settings (bass/treble..)?Missing or partly missing speaker outputs, occasionally able to break through at louder volumes – replace the muting relay (Beoparts-shop).
Martin
Soldering star capacitors have four leads. One center positive and three negative in the outer circle.
You can fit a general purpose capacitor with reasonable specs instead, just make sure to get the
polarity right and connect any negative pads that were previously connected by the original cap.Martin
Well.. they just always seem to be great performers.
Of the type 57xx family, Beogram 1700 was the newest of the “squares”.
It has the DC-servo controlled motor, it has the slimline tonearm with the round counterweight (read: easier adjustable tracking force) but still carries the good MMC20-series cartridge.
Good platter, and it doesn’t have the operation panel with the somewhat flimsy buttons found on the sloping models.All in all it’s just a stabile and solid build causing few problems.
Only thing you could argue is that it doesn’t have datalink.
Martin
Yes, but it’s neither particularly easy nor apparent how, and not something owners typically mess with.
It’s far more likely to be one of the reasons I listed above.Martin
Wrong tracking force setting?
Bad stylus?Beogram 1700 is a wonderful deck.
Matin
Many motors will run a bit noisy unloaded.
Have you tried with a belt fitted?Martin
The dial wheel can have seized in old lubricants.
It wouldn’t be a first.Martin
Beocords mains voltage setting configured correctly for 220-240V?
Martin
Could be one or more of:
Leads broken off the switch at the tapehead bridge.
Bent switch leafs.
Oxidated switch contacts.Martin
-
AuthorPosts
